Okay, this is exactly what this board is for. Getting different opinions. I am just offering mine. I have chosen not to use them because of things I found while researching my gliders. How can you be sure that they actually like the ball and aren't just panicing to get out and that's why they are running about? Also, I know that when mine are in their wheel they poop and pee on the run. If they are in the ball, all of that would just roll around with them and make for a scared, smelly glider.I'm not starting a war here, just opening a discussion.Anyone? Agree? Disagree? :)